HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

In this article, we will discuss the meaning of HP printer warning lights on HP DeskJet 4720, and 3630 printers and how to clear the warning lights.

Note: The guide below is for HP DeskJet Ink Advantage Ultra 4729, DeskJet Ink Advantage 3638, 3636, 3635, and DeskJet 3639, 3638, 3637, 3636, 3635, 3534,3633, 3632, 3631, and 3630 printers.

Table of Contents

Fast Blinking Power Light – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This is an indication that your printer’s cartridge door is open. Another reason responsible for the fast-blinking power light is that your printer has entered into an error state.

If you see an error message on the screen of your computer, follow the messages on the screen to fix the problem.

However, if no error message is displayed, follow the instructions below to resolve the problem.

Close your Printer’s Ink Cartridge Door

Follow the steps below to completely close your printer’s ink cartridge door:

Step 1: Close your printer’s output tray extender.

Step 2: Push the output tray into your HP printer.

Step 3: Open your printer’s exterior door.

Step 4: Check if the cartridge door is open; if it is, close it.

Step 5: Close your printer’s exterior door.

Step 6: Pull out your printer’s output tray.

Step 7: Pull out the output tray extender.

Print a document.

If the problem persists, then you need to service your HP printer.

To service your HP printer, contact HP Customer Support and fix a repair date for your printer. If you live in the Asia Pacific, you will be redirected to a service center close to you.

Printers that are still under warranty will be repaired for free. However, if your printer is no longer under warranty, you will pay the repair fees.

Blinking Wireless Light, and Solid Wireless Attention Icon and Wireless Icon – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This happens when the wireless network is configuring, your printer is unable to find the wireless signal, or the printer is unable to connect to the wireless network.

To resolve this problem, do the following:

1. Allow Your Printer to Connect to the Wireless Network

Sometimes, your HP printer might need some minutes for it to connect to your wireless network (access point or router). Therefore, when the wireless light is blinking, you need to be patient while the connection is established. After waiting for some minutes, then you can check the status of the wireless light.

If a wireless connection is established, then you don’t need to do any other troubleshooting.

If the wireless light continues to blink, do the next task.

2. Check if the Wireless Network has Issues

Check the following as they might be the reason why your HP printer is not connecting:

i. The wireless network is inactive, or the signal strength is low.

To confirm that the network is active, check if your access point or router is turned on. Also, check the signal strength and confirm that it is strong.

You can move your printer closer to your router or access point to increase the signal strength. It is recommended that your printer and your router should not be farther away than 3 feet to 5 feet (1.0 to 1.5 meters).

ii. Your printer is in standby or sleep mode.

You need to check your printer and wake it from sleep mode if it is not in ready mode. We recommend that you read this article: HP Printer Sleep Mode [How To, Issues & Solutions] to learn more about HP printer sleep mode.

iii. Your computer firewall is preventing your printer from connecting to your computer and network.

In this case, you need to temporarily disable your firewall, and then check if the connection is established and the wireless light has stopped blinking.

If the light becomes solid, then the firewall is responsible for the warning light. Therefore, you have to use the printer without enabling the firewall. However, make sure that you enable it when you are done with your printer.

If your printer’s wireless light continues to blink after disabling the firewall, then the firewall is not responsible for the blinking light. Therefore, you need to enable the firewall immediately.

iv. The signal of your wireless network is being interfered with by a device that is emitting radio signals (for example a cordless telephone or microwave).

If you have such devices close to your printer or router, you need to move them away.

v. A VPN (Virtual Private Network) is preventing your printer from your wireless network and computer.

After correcting each item listed above, check if the wireless light has stopped blinking.

If the wireless light becomes steady, then you don’t need to do any other troubleshooting.

However, if the light continues to blink, do the next task.

3. Connect your HP Printer to the Wireless Network

At this point, you need to connect your HP printer to your wireless network. Consult your printer manual to learn the process of doing this.

Blinking HP ePrint Light – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This happens when your printer’s ePrint function is on, but your printer doesn’t have a Web Services server connection.

To resolve this problem, you need to enable Web Services. To ensure that you don’t have this problem in the future and that your printer has the most recent functionality, you need to set up your printer to receive updates automatically. This is important because HP Web Services require these periodic updates for you to use the service.

How to Enable Web Services

To enable web services, do the following steps:

Step 1: Load your printer’s input tray with plain A4 or letter-size paper.

Step 2: Press the “Information” and “Wireless” buttons on the control panel of your HP printer at once.

This action will cause your printer to print a network configuration page.

Read this article: HP Configuration Page [How To/Issues & Solutions] to find out common HP configuration page issues and how to solve them.

Step 3: Check for your printer’s IP address under the section labeled “General Information.”

The IP address description list in that section is “URL(s) for Embedded Web Server.”

Step 4: Open a new tab or window on your computer’s browser.

Note: You will need an internet connection for the next steps.

Step 5: Click on the address bar of the browser.

Step 6: Type in your printer’s IP address.

Step 7: Press the “Enter” key on your keyboard.

This action will open your printer’s Embedded Web Server (EWS).

Step 6: Check the tab labeled “Home,” and click on “Web Services.”

Step 7: Check under the section listed as “Web Services Setting,” and click on “Setup.”

Step 8: Click on “Continue.”

Step 9: Check the box to accept the terms of use and also check the box to enable the Web Services option.

Step 10: Click on “Next.”

Your HP printer will search for updates. After that, a Web Services information page will be printed automatically.

Blinking Wireless Light and Wireless Attention Icon, and Solid Wireless Icon – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This happens when the printer is unable to connect to the wireless network. To resolve this problem, do the solutions we shared under the “Blinking Wireless Light, and Solid Wireless Attention Icon and Wireless Icon” section of this article.

All Control Panel Lights are Blinking and the Number of Copies Icon is Alternating between “E” and “5” – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This is an indication that your HP printer has a scanning error. In this state, your printer is still able to print, but cannot scan.

To resolve this problem, you need to reset your HP printer.

How to Reset your HP DeskJet 4720, 3630 Printer

Follow the steps below to reset your HP printer:

Step 1: Turn on your printer if it isn’t turned on.

Step 2: Remove the power cable from your HP printer.

Step 3: Disconnect the power cable from the power source (wall outlet, power strip, surge protector, etc.)

Step 4: Wait for about 60 seconds.

Step 5: Reconnect the power cable to an outlet rather than any other power source.

Note: Your HP printer should always be connected to an outlet according to HP’s recommendation.

Step 6: Turn on your HP printer.

This action will complete your printer’s reset.

You can read this article: How to Reset HP Printer [Detailed Guide] to learn about other resets that you can perform on your HP printer.

Try to scan a document or photo.

If the error persists, then you need to service your HP printer.

Number of Copies Icon is Alternating between “E” and “2” – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This is an indication that there is a paper size mismatch error. In other words, the paper size in the input tray does not match the paper size that is selected in the print settings.

This E2 paper size mismatch error has two patterns:

i. Number of Copies icon alternates between “E” and “2” – This happens when you are trying to print a job with a single page. The error occurs on the printed page.

ii. Number of Copies icon alternates between “E” and “2,” and Blinking Resume Light, Paper Error icon, and Error icon – This happens when you are trying to print a job with multiple pages. The error occurs on the first printed page. You can cancel the printing by pressing your printer’s “Cancel” button.

Note: If the printer’s “Resume” button is pressed, the error will occur on the rest of the printed pages. Therefore, the best thing is to press your printer’s “Cancel” button when you discover the error.

To resolve this paper size mismatch error, do the following solutions:

1. Load your Printer with the Right Paper Size

You need to load the printer’s input tray with the right paper size to resolve this error. Therefore, you need to take out the paper stack from the input tray, and then load it with the right paper size for the print job.

We will guide you on how to load plain paper, photo paper, and envelopes in the input tray of HP DeskJet 4720 and 3630 printers below.

How to Load Plain Paper in HP DeskJet 4720 and 3630 Printers

To load plain paper in HP DeskJet 4720 and 3630 printers, do the following steps:

Step 1: Lift your printer’s input tray.

Step 2: Move the input tray’s paper width guide to the extreme left.

Step 3: Place plain paper into your printer’s input tray.

Step 4: Slide the paper stack down.

Step 5: Move the input tray’s paper width guide to rest against the paper stack’s edges.

Step 6: Pull out your printer’s output tray.

Step 7: Lift the output tray extender.

How to Load Photo Paper in HP DeskJet 4720 and 3630 Printers

To load photo paper in HP DeskJet 4720 and 3630 printers, do the following steps:

Step 1: Lift your printer’s input tray.

Step 2: Move the input tray’s paper width guide to the extreme left.

Step 3: Place photo paper into your printer’s input tray.

Ensure that the short edge of the paper stack is down, while the print side faces up.

Step 4: Slide the paper stack down.

Note: For photo papers with perforated tabs, place the paper in the input tray in a way that the tabs come out on top.

Step 5: Move the input tray’s paper width guide to rest against the paper stack’s edges.

Note: Don’t leave photo paper in your printer’s input tray after you complete the print job as the paper’s quality might get affected due to the exposure. Always keep photo paper sealed in a bag, and kept in a cool and dark place.

Step 6: Pull out your printer’s output tray.

Step 7: Lift the output tray extender.

How to Load Envelopes in HP DeskJet 4720 and 3630 Printers

To load envelopes in HP DeskJet 4720 and 3630 printers, do the following steps:

Note: Don’t load your printer with more than 5 envelopes per time. Don’t use embossed or shiny envelopes or those that are designed with windows or clasps.

Step 1: Lift your printer’s input tray.

Step 2: Move the input tray’s paper width guide to the extreme left.

Step 3: Place a maximum of 5 envelopes (you can load less than 5) into the extreme-right area of your printer’s input tray.

Ensure that the side of the envelope with the flap faces down but is on the left, while the print side faces up.

Step 4: Move the input tray’s paper width guide to rest against the envelopes’ edges.

Step 5: Pull out your printer’s output tray.

Step 6: Lift the output tray extender.

If you are certain that the loaded paper is the right size, do the solution below.

2. Change the Paper Size in Print Settings

Follow the instructions below to change the paper size in print settings depending on the operating system you are using.

How to Change the Paper Size in Windows Print Settings

To change the paper size in Windows print settings, do the following steps:

Step 1: Open the program you want to print from.

Step 2: Click on “File.”

Step 3: Click on “Print.”

This action will open the Print window.

Step 4: Open the dialog box for “Properties.”

This option might be labeled as “Properties,” “Printer Setup,” “Printer,” “Preferences,” or “Options” depending on the program you are using.

Step 5: Click on the tab labeled “Paper/Quality.”

Step 6: Click on “Advanced.”

Step 7: Choose the correct paper size from the drop-down menu for “Paper Size.”

Step 8: Click on “OK.”

This action will apply the new settings.

Step 9: Click on “OK.”

This action will finalize your settings.

Step 10: Click on “Print.”

How to Change the Paper Size in OS X Print Settings

To change the paper size in OS X print settings, do the following steps:

Step 1: Open the document you want to print.

Step 2: Click on “File.”

Step 3: Click on “Print.”

This action will open the Print window.

Step 4: Choose the “Media & Quality” or “Paper Type/Quality” menu.

Step 5: Choose “Paper Type.”

If you find an option that is a perfect match to the paper size you loaded, choose that option.

Check if the error has been resolved.

If it is unresolved, then you need to service your HP printer.

You can also read this article: HP Printer Error Paper Mismatch [How to Fix] to learn more about this error and how to resolve it.

Solid Resume Light, Paper Error Icon, and Error Icon – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This happens when your HP printer is out of paper. To resolve this problem, you need to reload the paper into your printer’s input tray.

To reload the paper into your printer’s input tray, follow the steps we shared under the “How to Load Plain Paper in HP DeskJet 4720 and 3630 Printers” section of this article.

Blinking Resume Light, Ink Alert Light, Paper Error Icon, Error Icon, and Number of Copies Icon is Alternating between “E” and “4” – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This is an indication that there is paper jammed in your HP printer. To resolve this problem, do the following solutions.

1. Clear Paper Jam

Check and clear paper jams from the following areas of your printer.

How to Clear Paper Jam from the Input Tray of HP DeskJet 4720 and 3630 Printers

To clear the paper jam from the input tray of HP DeskJet 4720 and 3630 printers, do the following steps:

Step 1: Press your printer’s “Cancel” button to clear the jam automatically.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, do the steps below to remove the jammed paper manually.

Step 2: Gently pull out the jammed paper from your printer’s input tray with both hands.

Step 3: Remove the pieces of paper from the input tray if you find any.

Step 4: Ensure that the printer’s paper path doesn’t have foreign objects or paper pieces in it. If you find any, remove them.

Step 5: Reload the paper into the printer’s input tray.

Caution: Don’t remove the tray shield during this cleaning process as the shield prevents debris and other foreign materials from entering the printer’s paper path. This protection prevents the occurrence of paper jams.

Step 6: Press your printer’s “Resume” button to resume printing the current job.

Print a document, to check if the paper jam is cleared.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, check the next printer area.

How to Clear Paper Jam from the Output Tray of HP DeskJet 4720 and 3630 Printers

To clear the paper jam from the output tray of HP DeskJet 4720 and 3630 printers, do the following steps:

Step 1: Press your printer’s “Cancel” button to clear the jam automatically.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, do the steps below to remove the jammed paper manually.

Step 2: Gently pull out the jammed paper from your printer’s output tray with both hands.

Step 3: Remove the pieces of paper from the output tray if you find any.

Step 4: Press your printer’s “Resume” button to resume printing the current job.

Print a document, to check if the paper jam is cleared.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, check the next printer area.

How to Clear Paper Jam from the Ink Cartridge Access Area of HP DeskJet 4720 and 3630 Printers

To clear the paper jam from the ink cartridge access area of HP DeskJet 4720 and 3630 printers, do the following steps:

Step 1: Press your printer’s “Cancel” button to clear the jam automatically.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, do the steps below to remove the jammed paper manually.

Step 2: Turn off your HP printer by pressing its power button.

Step 3: Remove the USB cord (if connected) from your printer.

Step 4: Remove the printer’s power cable from your HP printer.

Warning: Ensure that you remove the power cable from your HP printer before placing your hand inside your printer to prevent electric shock or injuries.

Step 5: Close your printer’s output tray extender.

Step 6: Push the output tray into your HP printer.

Step 7: Open your printer’s exterior door.

Step 8: Open your printer’s ink cartridge access door.

Step 9: Gently move the carriage to the right if it is in the middle of your printer.

Step 10: Carefully pull out the jammed paper from your printer.

Step 11: Close your printer’s ink cartridge access door.

Step 15: Close your printer’s exterior door.

Step 16: Pull out your printer’s output tray.

Step 17: Pull out the output tray extender.

Step 18: Plug the printer’s power cable into your HP printer.

Step 19: If necessary, plug the USB cord into your HP printer.

Step 20: Turn on your HP printer.

Print a document, to check if the paper jam is cleared.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, check the next printer area.

How to Clear Paper Jam from the Underside of HP DeskJet 4720 and 3630 Printers

To clear the paper jam from the underside of HP DeskJet 4720 and 3630 printers, do the following steps:

Step 1: Press your printer’s “Cancel” button to clear the jam automatically.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, do the steps below to remove the jammed paper manually.

Step 2: Turn off your HP printer by pressing its power button.

Step 3: Remove the USB cord (if connected) from your printer.

Step 4: Remove the printer’s power cable from your HP printer.

Step 5: Lower the input tray into your printer.

Step 6: Close your printer’s output tray extender.

Step 7: Push the output tray into your printer.

Step 8: Turn your HP printer in a way that allows you to access the underside.

Caution: Before you turn the printer, hold the printer’s scanner lid as well as the input tray with your hands to prevent damage to these printer parts.

Step 9: Open the printer’s cleanout door by pulling the tabs on any side of the door.

Step 10: Take out the jammed paper from your printer.

Step 11: Close your printer’s cleanout door by carefully pushing it towards your printer until the latches click into their position.

Step 12: Turn over your printer to the normal position.

Step 13: Open your printer’s ink cartridge access door.

Step 14: Check inside for loose objects within your printer. If you find any, remove them.

Step 15: Close your printer’s ink cartridge access door.

Step 16: Plug the power cable back into your HP printer.

Step 17: Plug the USB cord back into your HP printer.

Step 18: Turn on your HP printer by pressing its power button.

Print a document, to check if the paper jam is cleared.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, do the next solution.

2. Ensure that the Carriage is Moving Freely

To ensure that the carriage is moving freely, do the following steps:

Step 1: Turn on your HP printer if it is turned off.

Step 2: Open your printer’s exterior door.

Step 3: Open your printer’s ink cartridge access door.

This action will cause the carriage to move to the middle area of your HP printer.

Step 4: Allow the carriage to become silent and idle before you proceed.

Step 5: While your printer is still on, remove the printer’s power cable from your HP printer.

Step 6: Disconnect the power cable from the wall outlet or power source.

Warning: Ensure that you remove the power cable from your HP printer to prevent electric shock or injuries before moving the carriage with your hand to reset the printer’s paper feed mechanism.

Step 7: Look for objects or paper that might prevent the carriage from moving freely. If you find any, remove them.

If you can’t see clearly, illuminate the area with the aid of a flashlight.

Caution: In case the paper gets torn when you try to pull it out from the rollers, inspect the rollers as well as the wheels for the torn paper pieces. Remove the pieces when you find them. This is important to prevent future jams.

Step 8: Place your hand inside your printer via the cartridge door.

Step 9: Move the printer’s carriage with your hand.

Move it to the left if it is on the right side.
Move it to the right if it is on the left side.
Move it to the right if it is in the center of your HP printer.

Step 10: Take out the obstructions or loose paper you might find.

Step 11: Push the carriage to the right and then to the left to confirm that the carriage can move freely from side to side.

Step 12: Close your printer’s ink cartridge access door.

Step 13: Close your printer’s exterior door.

Step 14: Reconnect the printer’s power cable to your HP printer.

Step 15: Plug the printer’s power cable into the electrical wall outlet.

Step 16: Turn on your HP printer.

Print a document, to check if the paper jam is cleared.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, do the next solution.

3. Clean your Printer’s Paper Rollers via an Automated Tool

To clean your printer’s paper rollers via an automated tool, do the following steps:

Step 1: Turn on your HP printer.

Step 2: Remove paper from your printer’s input tray.

Step 3: Press down the printer’s “Power” button.

Step 4: Press your printer’s “Cancel” button 3 times.

Step 5: Press your printer’s “Start Copy Color” button 7 times.

Step 6: Release your printer’s “Power” button.

Your printer will begin to make some noise; this should last for about 1 minute. Wait for your printer to become silent before you continue.

Print a document, to check if the paper jam is cleared.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, do the next solution.

4. Clean the Ink Smears via an Automated Tool

To clean the ink smears via an automated tool, do the steps below:

Note: Cleaning the ink smears on your printer can aid in clearing jams, and also optimize your print quality.

Step 1: Press down the printer’s “Power” button.

Step 2: Press the printer’s “Cancel” button 3 times.

Step 3: Press the printer’s “Start” button 8 times.

Step 4: Let go of the printer’s “Power” button.

Your printer will feed a sheet of paper slowly and then make some noises; this should last for about 1 minute.

Step 5: Wait for the page to come out of your printer before you take it out.

Print a document, to check if the paper jam is cleared.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, do the next solution.

5. Clean the Paper Rollers Inside your Printer’s Cartridge Access Area Manually

To clean the paper rollers inside your printer’s cartridge access area manually, do the following steps:

Step 1: Turn your HP printer off.

Step 2: Remove the printer’s power cable from your HP printer.

Step 3: Remove the USB cable from your HP printer (if connected).

Step 4: Lift the printer’s input tray.

Step 5: Lift and then hold the input tray shield in a position that enables you to see the inside of your printer.

Note: Don’t remove the shield as it prevents foreign objects and even debris from entering the paper path that could cause paper jams.

Step 6: Locate the paper rollers by looking through the input tray.

If the inside of the printer is too dark, get a flashlight to brighten the area.

Step 7: Get a long cotton swab and dampen it using distilled water.

Step 8: Squeeze excess water from the swab.

Step 9: Press the cotton swab to rest on the rollers.

Step 10: Use your fingers to rotate the rollers in an upward motion. Apply some pressure to ensure the removal of dirt buildup and dust.

Step 11: Return the printer’s input tray shield to its original position.

Step 12: Wait for about 10 minutes for the pickup rollers to get dry.

Step 13: Plug the printer’s power cable into your HP printer.

Step 14: Plug the USB cord into your HP printer.

Step 15: Turn on your HP printer.

Print a document, to check if the paper jam is cleared.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, do the next solution.

6. Reset your HP Printer

To reset your HP printer, follow the steps we shared under the “How to Reset your HP DeskJet 4720, 3630 Printer” section of this article.

After resetting your HP printer, print a document, to check if the paper jam is cleared.

If the jam is cleared, stop troubleshooting.

If the jam is not cleared, then you need to service your HP printer.

We recommend that you read this article: HP Printer Warning [Detailed Guide] to learn about other HP printer warnings that you might encounter when using your HP printer.

Blinking Resume and Ink Alert Lights, and Number of Copies Icon is Alternating between “E” and “3” – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This happens when your printer has a carriage jam. To fix this problem, do the solutions below:

1. Clear Paper Jam

To clear the paper jam, follow the instructions we shared under the “Clear Paper Jam” section of this article.

After clearing the jam, check if the issue is resolved.

If the issue persists, do the next solution.

2. Remove and then Reinstall the Cartridges

If the cartridges are not installed correctly, it might cause a carriage jam error. Therefore, removing and then reinstalling the cartridges should fix the error.

To remove and then reinstall the cartridges, do the following steps:

Step 1: Turn on your HP printer by pressing its power button if it is off.

Step 2: Open your printer’s exterior door.

Step 3: Open your printer’s ink cartridge access door.

The printer carriage will move to the middle of your printer. Wait for the carriage to become silent and idle before you proceed.

Step 4: Gently press down the ink cartridges one after the other to free them from their slots.

Step 5: Pull out the cartridges from their slots.

Caution: Ensure that you don’t touch the ink nozzles or copper contacts. Do not change the contact’s protective tape. If you touch these parts, it could lead to poor electrical connections, ink failure, and clogs.

Step 6: Slide the cartridges into the appropriate slots.

Step 7: Push the cartridges into their slots and ensure that they snap into place.

Step 8: Close your printer’s ink cartridge access door.

Step 9: Close your printer’s exterior door.

Check if the issue is resolved.

If the issue persists, do the next solution.

3. Plug your Printer’s Power Cable Straight into a Wall Outlet

Follow the steps below to plug your HP printer’s power cable directly into a wall outlet:

Step 1: Remove the printer’s power cable from your HP printer.

Step 2: Remove the printer’s power cable from its connected power source (surge protectors, power strips, etc.)

Step 3: Connect the printer’s power cable directly to a wall outlet.

Step 4: Plug the cable into your HP printer.

Step 5: Turn on your HP printer.

Check if the issue is resolved.

If the issue persists, do the next solution.

4. Reset your HP Printer

To reset your HP printer, follow the steps we shared under the “How to Reset your HP DeskJet 4720, 3630 Printer” section of this article.

After resetting your HP printer check if the issue is resolved.

If the issue persists, then you need to service your HP printer.

All Lights on the Control Panel are Blinking and the Number of Copies Icon is Alternating between “E” and “6” – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This is an indication that your printer has entered an error state. To resolve this problem, do the following solutions:

1. Reset your HP Printer

To reset your HP printer, follow the steps we shared under the “How to Reset your HP DeskJet 4720, 3630 Printer” section of this article.

After resetting your HP printer check if the issue is resolved.

If the issue persists, do the next solution.

2. Plug your Printer’s Power Cable Straight into a Wall Outlet

To plug your printer’s power cable directly into a wall outlet, follow the instructions we shared under the “Plug your Printer’s Power Cable Straight into a Wall Outlet” subsection of this article.

Check if the issue is resolved.

If the issue persists, then you need to service your HP printer.

Blinking Ink Level Icons (One or Both) with no Segment and Solid Ink Alert Light – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This is an indication that a cartridge or both cartridges are faulty, incompatible, damaged, missing, or incorrect. To resolve this problem, do the following solutions.

1. Confirm the Compatibility of the Cartridges

You need to confirm the compatibility of the installed ink cartridges. You can do that via the HP Store; however, using this method requires that you purchase the cartridges.

Below are the compatible ink cartridges for the HP printer models discussed in this article. Confirm that the cartridge installed in your HP printer is listed in the information below.

HP DeskJet 3630 Printers

*Ink Cartridge Type*	*North America & Asia Pacific (excluding Indonesia, India, & China)*	*Western Europe*	*Middle East, Latin America, Africa, & CIS*	*Indonesia, India, & China*
Black cartridge	HP 63XL Black HP 63	HP 302XL Black HP 302 Black	HP 123XL Black HP 123 Black	HP 803XL Black HP 803 Black
Color cartridge	HP 63XL Tri-color HP 63 Tri-color	HP 302XL Tri-color HP 302 Tri-color	HP 123XL Tri-color HP 123 Tri-color	HP 803XL Tri-color HP 803 Tri-color

HP DeskJet Advantage 3630 Printers

*Ink Cartridge Type*	*Asia Pacific*	*Europe, Africa, & Middle East*	*Latin America*
Black cartridge	HP 680 Black	HP 652 Black	HP 664XL Black HP 664 Black
Color cartridge	HP 680 Tri-color	HP 652 Tri-color	HP 664XL Tri-color HP 664 Tri-color

If the cartridges installed in your HP printer are compatible, do the next solution.

If the cartridges installed in your HP printer aren’t compatible, jump to the solution where we guide you on how to change the cartridge.

2. Ensure that the Cartridges are Installed Correctly

To ensure that the cartridges are installed correctly, do the following steps:

Step 1: Turn your HP printer on.

Step 2: Open your printer’s exterior door.

Step 3: Open your printer’s cartridge access door.

The carriage will move to the middle of your HP printer.

Step 4: Wait for the printer to become silent and idle before you proceed.

Step 5: Slightly press down the cartridge to free it from the slot.

Step 6: Pull out the cartridge from the slot.

Step 7: Check the contacts and confirm that the protective tape has been removed. If you find the tape on the contacts, remove them.

Caution: Don’t remove the electrical strip on the cartridge.

Step 8: Grasp the cartridge at both sides and direct the nozzles to face your printer.

Step 9: Insert the ink cartridge into the correct slot.

The right slot is for the black cartridge.
The left slot is for the tri-color cartridge.

Step 10: Push in the cartridge and ensure that it clicks into place.

Step 11: If the other cartridge was affected, repeat the above steps to change it as well.

Step 12: Close your printer’s ink cartridge access door.

Step 13: Close your printer’s exterior door.

Print a document.

If the issue persists, do the solution below.

3. Clean the Contacts on the Cartridge

To clean the contacts on the cartridge, do the following steps:

Step 1: Get these materials:

Dry fluff-free fabric, foam-rubbers swabs, or any material that is soft but doesn’t leave fibers behind (you can use coffee filters).
Distilled, bottled, or filtered water. Do not use tap water to prevent the cartridges from getting damaged by the impurities they might contain.

Caution: Don’t use alcohol or platen cleaners to clean the contacts on the cartridge to prevent the cartridge from getting damaged.

Step 2: Turn on your HP printer by pressing your printer’s power button.

Step 3: Open your printer’s exterior door.

Step 4: Open your printer’s ink cartridge access door.

The carriage will move to the middle of your printer. Wait for the carriage to become silent and idle before you proceed.

Step 5: Remove the printer’s power cable from your HP printer.

Step 6: Remove the USB cable from your printer unless you use a wireless network connection.

Step 7: Press down the cartridge to free it from its slot.

Step 8: Pull out the cartridge from its slot.

Caution: Ensure that you clean the cartridges one after the other. The cartridges shouldn’t be outside your printer for more than 30 minutes to prevent them from getting damaged.

Step 9: Grasp the cartridge on both sides.

Step 10: Check the contacts for debris and ink buildup.

Step 11: Clean the debris or inks on the contacts with a fluff-free fabric or dry swab. Clean the contacts until there is no debris or ink on them.

Caution: Ensure that you clean the contacts only. Do not allow debris or ink to smear on any part of the cartridge.

Step 12: Dampen the fluff-free fabric or foam rubber swab with distilled water.

Step 13: Squeeze excess water from the cotton swab.

Step 14: Clean the contacts on the cartridge.

Step 15: Wait for the cartridge to get dry; it should take about 10 minutes.

Step 16: Get another foam-rubber swab, and use distilled water to dampen it.

Step 17: Squeeze excess water from the cotton swab.

Step 18: Locate the carriage contacts inside your printer.

Step 19: Clean the carriage contacts.

Step 20: Wait for 10 minutes for the cleaned contacts to get dry or get another dry cotton swab to dry the contacts.

Note: Ensure that the cartridges aren’t outside your printer for more than 30 minutes to prevent them from getting damaged.

Step 21: Grasp the cartridge at both sides and direct the nozzles to face your printer.

Step 22: Insert the ink cartridge into the correct slot.

Step 23: Push in the cartridge and ensure that it clicks into place.

Step 24: If the other cartridge was affected, repeat the above steps to clean its contacts as well and then reinstall the cartridge into your printer.

Step 25: Close your printer’s cartridge access door.

Step 26: Close your printer’s exterior door.

Step 27: Plug the printer’s power cable into your HP printer.

Step 28: Plug the USB cord into your HP printer unless you use a wireless network connection.

Step 29: Turn on your HP printer by pressing its power button if it fails to automatically turn on.

Print a document.

If the issue persists, do the solution below.

4. Remove and then Reinstall the Cartridges

To remove and then reinstall the cartridges, follow the instructions we shared under the “Remove and then Reinstall the Cartridges” section of this article.

Print a document.

If the issue persists, do the solution below.

5. Clean the Contacts on the Cartridge Again

Cleaning the contacts on the carriage again might fix the problem. To clean the contacts, repeat the instructions we shared under the “Clean the Contacts on the Cartridge” section of this article.

After cleaning the contacts again, print a document.

If the issue persists, do the solution below.

6. Restart your HP Printer

To restart your HP printer, follow the steps below:

Step 1: Turn on your HP printer if it is not turned on.

Step 2: Remove the printer’s power cable from your printer.

Step 3: Remove the power cable from the electrical wall outlet.

Step 4: Wait for 15 seconds.

Step 5: Plug your printer’s power cable into the electrical wall outlet.

Step 6: Plug the power cable into your HP printer.

Step 7: Turn on your HP printer.

Print a document.

If the issue persists, do the solution below.

7. Replace the Cartridge in HP DeskJet 4720, and 3630 Printers

To replace the cartridge, do the following steps:

Step 1: Turn on your HP printer by pressing its power button if it isn’t turned on.

Step 2: Load the printer’s input tray with regular white paper.

Step 3: Open your printer’s exterior door.

Step 4: Open your printer’s cartridge access door.

The printer’s carriage will move to the middle of your printer.

Wait for the carriage to become silent and idle before you proceed.

Step 5: Gently press down the cartridge to free it from its slot.

Step 6: Pull out the cartridge from its slot.

Step 7: Take out the new cartridge from the packaging.

Step 8: Remove the protective plastic tape on the cartridge.

Step 9: Grasp the new cartridge at both sides and direct the nozzles to face your printer.

Step 10: Insert the ink cartridge into the correct slot.

The right slot is for the black cartridge.
The left slot is for the tri-color cartridge.

Step 11: Push in the cartridge and ensure that it clicks into place.

Step 12: If the other cartridge was affected, repeat the above steps to change it as well.

Step 13: Close your printer’s cartridge access door.

Step 14: Close your printer’s exterior door.

Step 15: Follow the prompts on your computer’s screen.

Step 16: Wait for 30 seconds for your printer to print an alignment page automatically.

Note: When a new cartridge is installed an alignment page will be automatically printed.

Do the next task below to complete the alignment process of the installed cartridge.

8. Align the Installed Cartridge

To align the installed cartridge, do the following steps:

Step 1: Lift your printer’s scanner lid.

Step 2: Take the alignment page that was printed after the cartridge was installed and place it on the scanner glass with the print side facing down.

Check the engraved guides surrounding the scanner glass for assistance on how to load the alignment page.

Step 3: Close your printer’s scanner lid.

Step 4: Press your printer’s “Start Copy Color” or “Start Copy Black” button.

Your printer will align the installed cartridge.

Note: If your printer doesn’t print the alignment page automatically, print it manually using the Printer Utility for mac OS X or macOS users of the HP Printer Assistant Software for Windows users.

Print a document.

If the issue persists, service your HP printer.

Blinking Ink Level Icons (One or Both) with no Segment and Solid Ink Alert Light, and Blinking Resume Light – HP Printer Warning Lights on HP DeskJet 4720, 3630 Printers

This happens when a cartridge or both cartridges are incompatible. It can also occur when the printer’s ink levels become low.

To resolve this issue, do the following solutions:

1. Confirm the Compatibility of the Cartridges

To confirm the compatibility of the installed cartridges, follow the instructions we shared under the “Confirm the Compatibility of the Cartridges” section of this article.

If the issue is not resolved, do the next solution.

2. Ensure that the Cartridges are Installed Correctly

To ensure that the cartridges are installed correctly, follow the steps we shared under the “Ensure that the Cartridges are Installed Correctly” section of this article.

If the issue is not resolved, do the next solution.

3. Replace the Empty or Low Cartridge

To replace the empty or low cartridge, follow the instructions we shared under the “Replace the Cartridge in HP DeskJet 4720, 3630 Printers” section of this article.

After replacing the cartridge, follow the instructions below to align the cartridge.

4. Align the Installed Cartridge

To align the installed cartridge, follow the instructions we shared under the “Align the Installed Cartridge” section of this article.

If aligning the cartridge did not resolve the issue, then you need to service your HP printer.

All Lights on the Control Panel are Turned off and the Printer is not Responding – HP Printer Warning Lights on HP DeskJet 4720, and 3630 Printers

When this happens, it means your HP printer is either turned off, or the power supply has an issue. To resolve this problem, do the following tasks:

1. Turn your HP Printer On

To do this, press your printer’s power button.

If your HP printer turns on, stop troubleshooting.

However, if it doesn’t turn on, do the task below.

2. Ensure that your HP Printer is Connected to a Power Source

To ensure that your HP printer is connected to a power source, do the following steps:

Step 1: Remove the printer’s power cable from your HP printer.

Step 2: Plug the power cable back into your HP printer.

Ensure that it is properly fitted into your printer’s power socket.

Step 3: Disconnect the printer’s power cable from the wall outlet.

Step 4: Plug the power cable into a different but working wall outlet.

Step 5: Turn on your HP printer.

If your HP printer turns on, stop troubleshooting.

However, if it doesn’t turn on, do the task below.

3. Test your printer using another Power Cord

In some cases, the printer’s power cord might be faulty. Therefore, to confirm that the cord is not faulty, use another cord to reset your printer’s module and then test your printer’s power.

How to Reset Printer Power Module

To reset your printer power module, do the following steps:

Step 1: Remove the printer’s power cable from your printer.

Step 2: Unplug the printer’s power cable from the wall outlet.

Step 3: Disconnect the power cable from the power module.

Step 4: Wait for 15 seconds.

Step 5: Plug the printer’s power cable into your printer.

Step 6: Connect the power cable to the power module.

Step 7: Plug the printer’s power cable into a wall outlet.

Don’t plug the cable into a surge protector or power strip.

Step 8: Check if there is an LED light on the power module.

If there’s no LED light, follow the instructions under the “Test your Printer’s Power” subsection below.

If there’s an LED light, check if the LED turns on.

If the LED doesn’t turn on, change the power module.

If the LED turns on, follow the instructions under the “Test your Printer’s Power” subsection below.

Test your Printer’s Power

To test your printer’s power, do the following steps:

Step 1: Press and then quickly let go of the printer’s “Power” button.

This action will begin a Power On/Off cycle.

Warning: Don’t press down the power button for a long time as this might cause the printer to turn on and off without entering the power on/off cycle. If this occurs, press and then quickly let go of the printer’s power button.

Step 2: Confirm that your printer is turned on.

If the above instructions resolve the problem, stop troubleshooting.

If your HP printer turns on when using another cord, then the initial cord is faulty. Therefore, you need to get a new power cord.

If using another power cord didn’t resolve the problem, then you need to service your HP printer.

You can also read this article: HP Printer is Not Responding [Proven Solutions] to find other solutions if your HP printer won’t respond.